Mining apparatus



T. W. CAMPBELL.

MINING APPARATUS.

Patented Apr. 15, 1884.

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THOMAS W. CAMPBELL, OF VALLEY FALLS, KANSAS.

MINING'APPARATUS.

SPECIFICATION forming part of Letters Patent No. 297,064, dated April 15, 1884. Application filed October 10, 1883. (No model.)

To all whom, it may concern-r Be it known that I, THOMAS W. CAMPBELL, acitizen of the United States, residing at Valley Falls, in the county of Jefferson and State of Kansas, have invented certain new and use ful Improvements in Mining Apparatus, of riage or sled is which the following is a specification, referl P, from which ence loci drawing.

This invention relates to certain improve ments in mining apparatus; and it has for its objects to provide for quickly and effectually undermining the strata of coal in a mine, and removing the clay or other like material generally found stratified between the same by horse or steam power instead of by manual labor, as heretofore practiced. These objects I attain by the means illustrated in the accompanying drawing, in which is represented a plan view of a section ofa mine, showing my improved apparatus in position foroperation therein.

The letter A indicates a section or segment of a wheel,which is grooved on its periphery for the purpose hereinafter described. -The said section or segment is pivoted upon a short journal, B, secured to a flat head at one end of a flat bar, I), which is perforated at intervals, as shown.

The letter E indicates a metallic castinghaving a longitudinal groove, F, in which the bar D is adapted to tit and be moved, so as to adjust the segment to its work, as more fully hereinafter specified. The said casting is adapted to be secured ina recess, G, formed ng had therein to the accompanying in the door of a lateral drift, extending from.

the main drift or tunnel. Thesegment at one end is provided with a tool-holder, H, carry ing a tool or cutter, I, which holder has secured to it a staple, K. To said staple is secured one end of a rope, L, the other end of which is secured to a drum, which may be put in motion by any suitable motor to operate the segment.

The letter M indicates an auxiliary rope,attached to the segment, by means of which the segment is returned to its normal position after having detached the cutting apparatus,

and placed in the socket H a scraper, I, as shown in the other lateral drift.

The letter N indicates a carriage or sled arranged to move horizontally in the main tunnel or shaft of the mine. The said carprovided with a central post, extends a rod, Q, which has longitudinal play in its socket in said post, and upon the end of which is pivoted a section, R, having a cutting-edge, S, and to which is secured an additional cutter, S. The said parts are kept pressed normally against the material to be cut by means of the spring T, lever U, and adjustable bar Y, as indicated.

V indicates an excavator, which consists of a compound lever, loosely secu red to the rear of the cutter-section. The said lever is composed of a beam, at, block I), and connecting links 0 d, the link d being adjustable, as shown, so that the inclination of the beam may be regulated, as required. The carriage or sled is carried forward by attaching the end of the chain M to the link \V at one end. It is carried backward by means of the corresponding chain on the opposite side, which is connected to the block b.

In practice, two lateral drifts are made at proper intervals leading from the main drifts. In these similar segments are located,and are operated to undercut the underlyingstratum of clay or other material under the stratum of coal. When sufficiently excavated, the carriage is put in operation to undermine the intervening port-ion Z, the loose dirt removed being banked at A to form a bed, against which the'carriage travels. Vhen sufficiently undermined, the portion Z may be easily broken up and removed.

The cutting and excavating mechanism of the carriage may be reversed, so as to operate in the opposite direction when desired.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s

1. The combination, with the segment having a peripheral groove, of the flat perforated bar, to which said segment is journaled, the longitudinally-grooved cast-metal section, and

means for adjusting the bar thereto, and the l tor secured to the cutter-section, the whole 10 drive ropes and pulleys,the wholebeing adaptarranged to operate substantially in the man ed to be secured to the floor of the mine-drifts ner and for the purposes specified.

and operated by a suitable motor, substau In testimony whereof Iaffix my signature in tially as specified. I 1 presence of two witnesses.

2. The combination, with the carriage and THOMAS XV. CAMPBELL.

cutters and the spring and 1ever for hold- D. B. NORTHRUP,

the mechanism for movlng the same, of the W1tnesses:

ing the same to their work, and the excaval XVILsoN BICKFORD. 

